Contexts headers not showing up
 

I'm a newbie, so this should be simple. In "Contexts" mode, no headers (corresponding to contexts and subcontexts listed in the sidebar) show up in the main window. For example, I have a "Post Office" subcontext under my "Errands" context. When I click on Errands in the sidebar, all my errands actions are listed, including post office actions, uncategorized, with no header/s like the "Errands : Home Depot" screenshot in the intro video.

Can anybody help? Thanks.

Never mind, I found it in the View toolbar. Thanks